import Vue from 'vue'
import VueRouter from 'vue-router'

//import Login from './components/Login.vue'
const Login = () => import(/* webpackChunkName: "login_home_welcome" */ './components/Login.vue')
//import Home from './components/Home.vue'
const Home = () => import(/* webpackChunkName: "login_home_welcome" */ './components/Home.vue')
//import Welcome from './components/Welcome.vue'    这三个组件会被打包到同个地方
const Welcome = () => import(/* webpackChunkName: "login_home_welcome" */ './components/Welcome.vue')

//import Users from './components/user/Users.vue'
const Users = () => import(/* webpackChunkName: "Users_Rights_Roles" */ './components/user/Users.vue')
//import Rights from './components/power/Rights.vue'
const Rights = () => import(/* webpackChunkName: "Users_Rights_Roles" */ './components/power/Rights.vue')
//import Roles from './components/power/Roles.vue'
const Roles = () => import(/* webpackChunkName: "Users_Rights_Roles" */ './components/power/Roles.vue')

//import Cate from './components/goods/Cate.vue'
const Cate = () => import(/* webpackChunkName: "Cate_Params" */ './components/goods/Cate.vue')
//import Params from './components/goods/Params.vue'
const Params = () => import(/* webpackChunkName: "Cate_Params" */ './components/goods/Params.vue')

//import GoodList from './components/goods/List.vue'
const GoodList = () => import(/* webpackChunkName: "GoodList_Add" */ './components/goods/List.vue')
//import Add from './components/goods/Add.vue'
const Add = () => import(/* webpackChunkName: "GoodList_Add" */ './components/goods/Add.vue')

//import Order from './components/order/Order.vue'
const Order = () => import(/* webpackChunkName: "Order_Add" */ './components/order/Order.vue')
//import Report from './components/report/Report.vue'
const Report = () => import(/* webpackChunkName: "Order_Add" */ './components/report/Report.vue')

Vue.use(VueRouter)

const routes = [
  {path:'/',redirect:'/login'},
  {path:'/login',component:Login},
  {
   path:'/home',
   component:Home,
   redirect:'/welcome',
   children:[
    { path:'/welcome',component:Welcome},{ path:'/users',component:Users},{ path:'/rights',component:Rights},{ path:'/roles',component:Roles}
    ,{ path:'/categories',component:Cate},{ path:'/params',component:Params},{ path:'/goods',component:GoodList},{ path:'/goods/add',component:Add}
    ,{ path:'/orders',component: Order},{ path:'/reports',component: Report}
   ]
  }
]

const router = new VueRouter({
  routes
})

//挂载路由导航守卫  如果用户没有登录，但是直接通过url访问特定页面，需要重新导航到登录页面
router.beforeEach((to,from,next)=>{
  //to 将要访问的路径
  //from 代表从哪个路径跳转而来
  //next 是一个函数，表示放行
  //next()放行     next('/login')强制跳转路径
  if(to.path==='/login') return next();
  //获取token
  const tokenStr=window.sessionStorage.getItem('token')
  if(!tokenStr) return next('/login')
  next()
})

export default router 
